Drawing, rolling, and wiredrawing of metals



Patented Aug. 4, 1925.

UNITED STATES, PATENT option.

No Drawing.

To all whom it mag concewt:

Be it known that I, GAs'roN DE DUDZEELE, subject of the King of Belgium, residing at Paris, France, have invented certain new and useful Improvements in the Drawing, Rolling, and Wiredrawing of Metals, of which the following'is .a specification.

This invention relates to the drawing, v rolling and wire-drawing of metals and has for its object to enable the articles under treatment to be subjected to several successive operations without the necessity of annealing or cleaning between each operation, as is the case with the known methods. improvement constituting the present invention consists in amalgamating by any suit able means the surface of the article under In this way, there is formed a penetrating layer of amalgam, the coeflicient of friction of which on the draw plates, mandrels, and rolling and other cylinders, is much less than the friction of the raw. metal and even acts to a certain extent as a lubricant, so that it becomes possible to subject the articles to several successive mechanical treatments without any other optreatment.

oration.

It is therefore clear that the process according to this invention is of the importance for the drawing, wirerawing GASTON DE DUDEELE, 0F PARIS, FRANCE.

Application filed January 26, 1924. Serial No. 688,853.

metal may be carried out able method.

What I claim is: The

metals to I change their metals to change their and rolling of metals more particularly in mated metal.

the case of the manu facture of drawn steel 4. A process according t tubes or bars of. circular or other profile in lution of a mercury .sa

section.

In order to carry out the process, it is sufficient to clean the article, such for instance as a billet or bloom or a steel tube in the nametothis specification.

rough, and to dip it in an aqueous solution, containing about ten grams of bi-chloride of mercury per litre. An amalgam is thus formed on the surface of the steel, which mercury per litre.

In testimony whereof Witnesses J. ANNENGAND, W. DEFEVRIMONT.

IIDRAWING, ROLLING, AND WIREDRAWING O'F METALS.

. makes it possible to subject the article to several successive drawing operations without annealing or cleaning.

It is obvious that the invention is in no way confined to the example above given and that the amalgamation of the surface of the by any other suit- It is to be understood that by the expression mechanically working metals? in the appended claims, it is intended to cover drawing, wire-drawing and rolling metals.

1. A process for mechanically w0rking form, comprising,

amalgamating a metal starting piece to be worked into a different form, and then mechanically working the amalgamated metal starting piece into its changed finished form.

2. A process for mechanically working form, comprlsing,

treating the surface of a metal starting piece to be worked into a difierent finished form with a solution of a mercury salt capable of amalgamating the surface of the piece, and then mechanically working the amalgamated metal piece into its different finished form.

3. A process for drawing metals, compriseatest ing, amalgamating the metal to be drawn and then mechanically drawing the amalgato claim 2, said sobeing an aqueous solution of about ten grains of bi-chloride of I have signed my GASTON DE DUDZEELE. 

